8GB Industrial MicroSD UHS-1 C2 Linux

Manufacturer Part Number : Sandisk SDSDQAF3-008G-I
Interface : UHS-1 SDR104
More reliable MLC NAND memory inside

Sequential Write speed : 32.7MB/sec
Sequential Read speed : 75.2MB/sec
OS preinstalled
Ready to run out of the box

Insert the SD Card in this way

Storage I/O comparison 

The C2 can boot from a MicroSD card or an eMMC module. The MicroSD interface supports the higher performance UHS-1 mode as well. File access of a 512MB file (read/write) on two different storage options shows distinct performance differences. The eMMC 5.0 storage is ~7x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card is ~4x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card provides a great low-cost option for many applications!

To obtain the results in the storage I/O comparison graph, type the following lines at a command prompt.
Write speed command :
$ dd if=/dev/zero of=test.tmp oflag=direct bs=8M count=64

Read speed command :
$ dd if=test.tmp of=/dev/null iflag=direct bs=8M count=64